scholarly journals When polarons meet polaritons: Exciton-vibration interactions in organic molecules strongly coupled to confined light fields

2016 ◽  
Vol 94 (19) ◽  
Author(s):  
Ning Wu ◽  
Johannes Feist ◽  
Francisco J. Garcia-Vidal
Keyword(s):  
Organic Molecules ◽  
Light Fields ◽  
Strongly Coupled

scholarly journals Impact of organic nitrates on urban ozone production

2011 ◽  
Vol 11 (9) ◽  
pp. 4085-4094 ◽  
Author(s):  
D. K. Farmer ◽  
A. E. Perring ◽  
P. J. Wooldridge ◽  
D. R. Blake ◽  
A. Baker ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Ozone Production ◽  
Organic Nitrate ◽  
Organic Nitrates ◽  
Gaseous Nitrogen ◽  
Strongly Coupled ◽  
Chain Reactions ◽  
Independent Variables ◽  
Nitrate Production ◽  
Current Thinking

Abstract. Urban O3 is produced by photochemical chain reactions that amplify background O3 in mixtures of gaseous nitrogen oxides (NOx) and organic molecules. Current thinking treats NOx and organics as independent variables that limit O3 production depending on the NOx to organic ratio; in this paradigm, reducing organics either has no effect or reduces O3. We describe a theoretical counterexample where NOx and organics are strongly coupled and reducing organics increases O3 production, and illustrate the example with observations from Mexico City. This effect arises from chain termination in the HOx and NOx cycles via organic nitrate production. We show that reductions in VOC reactivity that inadvertently reduce organic nitrate production rates will be counterproductive without concurrent reductions in NOx or other organics.

scholarly journals Impact of organic nitrates on urban ozone production

2010 ◽  
Vol 10 (10) ◽  
pp. 23423-23448
Author(s):  
D. K. Farmer ◽  
A. E. Perring ◽  
P. J. Wooldridge ◽  
D. R. Blake ◽  
A. Baker ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Ozone Production ◽  
Organic Nitrate ◽  
Organic Nitrates ◽  
Gaseous Nitrogen ◽  
Strongly Coupled ◽  
Chain Reactions ◽  
Independent Variables ◽  
Nitrate Production ◽  
Current Thinking

Abstract. Urban O3 is produced by photochemical chain reactions that amplify background O3 in mixtures of gaseous nitrogen oxides (NOx) and organic molecules. Current thinking treats NOx and organics as independent variables that limit O3 production depending on the NOx to organic ratio; in this paradigm, reducing organics either has no effect or reduces O3. We describe a theoretical counterexample where NOx and organics are strongly coupled and reducing organics increases O3 production, and illustrate the example with observations from Mexico City. This effect arises from chain termination in the HOx and NOx cycles via organic nitrate production. We show that emission reductions that inadvertently reduce organic nitrate production rates will be counterproductive without concurrent reductions in NOx or other organics.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

Direct phase determination in electron crystallography: small organic molecules

1992 ◽  
Vol 50 (2) ◽  
pp. 1166-1167
Author(s):  
Douglas L. Dorset
Keyword(s):  
Organic Molecules ◽  
Data Sets ◽  
Temperature Structure ◽  
3D Analysis ◽  
Intensity Data ◽  
Electron Crystallography ◽  
Phase Determination ◽  
Measured Intensity ◽  
3D Data

The quantitative use of electron diffraction intensity data for the determination of crystal structures represents the pioneering achievement in the electron crystallography of organic molecules, an effort largely begun by B. K. Vainshtein and his co-workers. However, despite numerous representative structure analyses yielding results consistent with X-ray determination, this entire effort was viewed with considerable mistrust by many crystallographers. This was no doubt due to the rather high crystallographic R-factors reported for some structures and, more importantly, the failure to convince many skeptics that the measured intensity data were adequate for ab initio structure determinations.We have recently demonstrated the utility of these data sets for structure analyses by direct phase determination based on the probabilistic estimate of three- and four-phase structure invariant sums. Examples include the structure of diketopiperazine using Vainshtein's 3D data, a similar 3D analysis of the room temperature structure of thiourea, and a zonal determination of the urea structure, the latter also based on data collected by the Moscow group.

Strongly coupled nonneutral plasmas : Equilibrium and relaxation in two-component plasmas in Penning-Malmberg trap

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-271-Pr5-274
Author(s):  
H. Totsuji ◽  
K. Tsuruta ◽  
C. Totsuji ◽  
K. Nakano ◽  
T. Kishimoto ◽  
...  
Keyword(s):  
Strongly Coupled ◽  
Nonneutral Plasmas ◽  
Two Component
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